Velocity173 RG Unidoor Vic

I have just restarted working on my Velocity 173 RG Unidoor . I know that this an old topic but I am at the stage where I need to consider using the top mounted NACA scoops for engine cooling and induction air. As I am living in Australia I have not had any opportunities to look at other builders installations in detail and would appreciate pictures and details of same. I am planning on installing an IO 360 Lycoming engine and a DUC Cobra 3 blade ground adjustable propeller and 8 inch Saber extension. One of the details I am most interested in is the size of the outlets of the NACA ducts, as I will need to cut these into my bulkhead shortly. Another is details of the induction air system used including any filtration system and alternate air device. Thanks in advance, Jim